Analysis
- max time kernel
141s - max time network
129s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
09/06/2024, 00:21
General
- Target e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.exe
- Size 4.7MB
- Sample240609-anhtksbd99
- SHA256 e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376
Malware Config
Extracted
-
socks5systemz
-
aalnimh.ru
-
http://aalnimh.ru/search/?q=67e28dd8655ba77a135ffe187c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa48e8889b5e4fa9281ae978a571ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff819c9ed909f3a
-
http://aalnimh.ru/search/?q=67e28dd8655ba77a135ffe187c27d78406abdd88be4b12eab517aa5c96bd86e8968248805a8bbc896c58e713bc90c91d36b5281fc235a925ed3e06d6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee929232cf6a9317
Signatures
- Detect Socks5Systemz Payload 3 IoCs
- Socks5Systemz
Socks5Systemz is a botnet written in C++.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 1 IoCs
- Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.exe"C:\Users\Admin\AppData\Local\Temp\e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\is-0U4A1.tmp\e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.tmp"C:\Users\Admin\AppData\Local\Temp\is-0U4A1.tmp\e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.tmp" /SL5="$40214,4667824,54272,C:\Users\Admin\AppData\Local\Temp\e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i3⤵
- Executes dropped EXE
-
-
C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe"C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s3⤵
- Executes dropped EXE
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
lesserextent32.exe
e76bea41af0553b58bb6e8c948cb36f14cbfe8c9784844752bcc821b3a217376.tmp
_iscrypt.dll
memory/1500-70-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/1500-7-0x0000000000400000-0x00000000004BA000-memory.dmp
memory/2964-2-0x0000000000401000-0x000000000040B000-memory.dmp
memory/2964-0-0x0000000000400000-0x0000000000414000-memory.dmp
memory/2964-69-0x0000000000400000-0x0000000000414000-memory.dmp
memory/3356-63-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3356-60-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3356-59-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/3356-65-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-74-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-97-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-68-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-77-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-80-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-83-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-84-0x00000000024C0000-0x0000000002562000-memory.dmp
memory/4452-88-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-94-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-71-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-100-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-103-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-106-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-109-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-110-0x00000000024C0000-0x0000000002562000-memory.dmp
memory/4452-111-0x00000000024C0000-0x0000000002562000-memory.dmp
memory/4452-115-0x0000000000400000-0x00000000006C1000-memory.dmp
memory/4452-118-0x0000000000400000-0x00000000006C1000-memory.dmp